JP6458923B2 - Door opener - Google Patents

Description

  The present invention relates to a door opening / closing device.

  Some doors such as a back door and a slide door of a vehicle are configured to be opened and closed by a door opening and closing device in addition to manual opening and closing (see, for example, Patent Document 1). In addition, there is a door opening / closing device that assists manual opening and closing to reduce the burden on the operator.

  The door opening / closing device includes, for example, an electric motor and an output shaft to which power of the electric motor is transmitted via a speed reduction mechanism. In this door opening and closing device, the output shaft is rotated by driving the electric motor, and the door provided on the vehicle main body of the electric motor can be moved in the opening direction or the closing direction along the axis of the output shaft.

JP-A-2005-082019

  Such a door opening / closing device is required to have a small power loss of the motor during the door opening / closing operation, that is, to have high output efficiency. In particular, in the speed reduction mechanism and the output shaft that transmit the power of the motor along the axis of the output shaft, the shaft center of each member that is disposed on the shaft center of the output shaft and transmits the power is highly accurate. It is preferable to lie on the axis.

  This invention is made | formed in view of the above, Comprising: It aims at providing the door opening / closing apparatus with high output efficiency.

  In order to solve the above-described problems and achieve the object, a door opening and closing device according to the present invention is disposed on a motor and an extension of the shaft center of the motor, and the power of the motor is transmitted through a speed reduction mechanism. A door opening / closing device that opens and closes the door via the output shaft by driving the motor, the degree of position on both end faces of the output shaft being φ0.01 or more and φ0.1 or less It is characterized by being set to.

  In the door opening and closing apparatus according to the present invention, in the above invention, the speed reduction mechanism includes a planetary gear mechanism having a sun gear disposed on an extension of the axis of the output shaft, and a reference perpendicular to the axis of the sun gear. The position degree or coaxiality of the axis of at least one end face of the sun gear with respect to the axis of the surface is set to φ0.01 or more and φ0.1 or less.

  The door opening and closing apparatus according to the present invention is the door opening and closing device according to the present invention, wherein the eccentric distance between the center of gravity when the motor, the speed reduction mechanism, and the output shaft are combined and the shaft center of the output shaft is defined as the output shaft. It is characterized by being set smaller than 2/10 of the diameter.

Further, the door opening and closing device according to the present invention, in the above invention, the center of gravity position when an arm that links between the door and the combination of the said arm and said motor and said speed reduction mechanism and said output shaft, The eccentric distance from the axis of the output shaft is set to be smaller than 2/10 of the diameter of the output shaft.

  The door opening and closing apparatus according to the present invention is the door opening and closing device according to the above invention, wherein the speed reduction mechanism sequentially reduces the power of the motor to rotate the output shaft, and the first planetary gear mechanism and the second planetary gear mechanism. 3 of the planetary gear mechanism, and the eccentric distance between the center of gravity when the motor and the first planetary gear mechanism are combined and the axis of the output shaft is 1/10 of the diameter of the output shaft. The eccentric distance between the center of gravity when the second planetary gear mechanism is combined with the second planetary gear mechanism and the shaft center of the output shaft is set to 1 of the diameter of the output shaft. It is characterized by being set smaller than / 10.

  According to the present invention, since the degree of position on both end faces of the output shaft is set to φ0.01 or more and φ0.1 or less, a door opening / closing device with high output efficiency can be realized.

FIG. 1 is a schematic diagram showing an installation example when the door opening and closing device of the present embodiment is used for opening and closing a back door. FIG. 2 is a schematic diagram showing an installation example when the door opening and closing device of the present embodiment is used for opening and closing the back door. FIG. 3 is a schematic diagram showing the configuration of the door opening and closing device of the present embodiment. 4 is a cross-sectional view taken along the axis of the output shaft of the door opening and closing device of FIG. FIG. 5 is an exploded perspective view showing the configuration of the first planetary gear mechanism in the door opening and closing device of FIG. 6 is an exploded perspective view showing a configuration of a sensor mechanism in the door opening and closing device of FIG. FIG. 7 is an exploded perspective view showing configurations of a second planetary gear mechanism, a third planetary gear mechanism, and an arm in the door opening and closing device of FIG. FIG. 8 is a schematic diagram showing the position of the center of gravity when the motor of the door opening and closing device of FIG. 3 and the first planetary gear mechanism are combined. FIG. 9 is a schematic diagram showing the position of the center of gravity when the second planetary gear mechanism and the third planetary gear mechanism of the door opening / closing device of FIG. 3 are combined. FIG. 10 is a schematic diagram showing the position of the center of gravity when the motor, the speed reduction mechanism, and the output shaft of the door opening and closing device of FIG. 3 are combined. Figure 11 is a schematic diagram showing the gravity center position when the combination of the output shaft and the arm motor and speed reduction mechanism of the door opening and closing device of FIG. FIG. 12 is a schematic diagram showing an installation example when the door opening and closing apparatus of the present embodiment is used for opening and closing a sliding door. FIG. 13 is a schematic diagram when FIG. 12 is viewed from above the vehicle.

  Hereinafter, an embodiment of a door opening and closing apparatus according to the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments. In the description of the drawings, the same or corresponding elements are appropriately denoted by the same reference numerals. It should be noted that the drawings are schematic, and the relationship between the dimensions of each element, the ratio of each element, and the like may differ from the actual situation. Even between the drawings, there are cases in which portions having different dimensional relationships and ratios are included.

  Further, in this specification, with respect to the position degree and the coaxiality, the position degree tolerance and the coaxiality tolerance are defined as geometric tolerance “JIS B0021: 1998 product geometric characteristic specification (GPS) —geometric tolerance display method—shape, posture, This is a value specified by the “tolerance display method of position and shake”.

(Embodiment)
First, an installation example when the door opening and closing device of the present embodiment is installed in a vehicle will be described. The door opening and closing device of the present embodiment is for opening and closing a back door of an upper hinge provided in a rear end opening of a vehicle body in a vehicle such as a four-wheeled vehicle. 1 and 2 are schematic views showing an installation example when the door opening and closing device of the present embodiment is used for opening and closing a back door. FIG. 1 shows a state where the back door is closed, and FIG. 2 shows a state where the back door is open. 1 (a) and 2 (a) are general views of the rear of the vehicle, and FIGS. 1 (b) and 2 (b) are portions of FIGS. 1 (a) and 2 (a), respectively. It is an enlarged view.

  FIG. 3 is a schematic diagram showing the configuration of the door opening and closing device of the present embodiment. As shown in FIG. 3, the door opening / closing device 1 includes a motor 2, an output shaft 3, and a speed reduction mechanism 4, which are connected along the axis of the output shaft 3. As shown in FIG. 3, the speed reduction mechanism 4 includes a first planetary gear mechanism 5, a sensor mechanism 6, a second planetary gear mechanism 7, and a third planetary gear mechanism 8. The motor 2 and the sensor mechanism 6 are supplied with electric power from an in-vehicle power source.

  As shown in FIGS. 1 and 2, the door opening and closing apparatus 1 of the present embodiment is fixed to the ceiling of the vehicle 100 in a state where the axis of the output shaft 3 is horizontal in the width direction of the vehicle 100. Then, one end of a rod R as an opening / closing member is connected to the arm 9 connected to the door opening / closing device 1. A hinge 102 as an opening / closing member is connected to the other end of the rod R. One end of the hinge 102 is fixed to the ceiling of the vehicle 100 by a bracket B3. The other end of the hinge 102 is fixed to the back door 101.

  Next, a specific configuration of the door opening and closing apparatus 1 according to the embodiment of the present invention will be described with reference to FIG. 3 and FIGS. 4 is a cross-sectional view taken along the axis of the output shaft of the door opening and closing device of FIG. FIG. 5 is an exploded perspective view showing the configuration of the first planetary gear mechanism in the door opening and closing device of FIG. 6 is an exploded perspective view showing a configuration of a sensor mechanism in the door opening and closing device of FIG. FIG. 7 is an exploded perspective view showing configurations of a second planetary gear mechanism, a third planetary gear mechanism, and an arm in the door opening and closing device of FIG.

  The motor 2 generates power for opening and closing the door, and a rotor, an electromagnet, and the like (not shown) are accommodated in a cylindrical motor case 201 as an accommodating portion. The electromagnet is connected to the on-vehicle power source and supplied with power. The output shaft 3 screwed with the bolt V5 outputs power for opening and closing the door, and is connected to the rotating shaft of the motor 2 via the speed reduction mechanism 4. An arm 9 is attached to the output shaft 3 to link the door. The arm 9 is connected to the rod R and the hinge 102 of FIGS.

  The speed reduction mechanism 4 decelerates the power of the motor 2 and transmits it to the output shaft 3. From the motor 2 side, the first planetary gear mechanism 5, the sensor mechanism 6, the second planetary gear mechanism 7, and the third They are arranged along the axis of the output shaft 3 in the order of the planetary gear mechanism 8.

  As shown in FIG. 5, the first planetary gear mechanism 5 is a first reduction mechanism that decelerates and outputs the power input from the motor 2. The first planetary gear mechanism 5 includes a first sun gear 501, a first planetary gear 502, a first planetary carrier 503, and a rotatable first ring gear 504, which are cylinders serving as housing members. The unit is housed in a gear case 510. The first planetary carrier 503 is fitted and fixed to the gear case 510. The gear case 510 is fixed to the motor case 201 by screwing a fixing ear 510a provided on the outer peripheral surface and the motor case 201 with screws (not shown). Further, the gear case 510 has a bracket B1 as a fixing means for fixing the door opening / closing device 1 to the vehicle body or the door. A magnet shaft 604 that constitutes the sensor mechanism 6 is serrated to the first ring gear 504 (see FIG. 4).

  The first sun gear 501 extending in the axial direction is connected to the motor 2 so as to rotate when the motor 2 is driven. When the first sun gear 501 rotates, the first planetary gear 502 rotates. When the first planetary gear 502 rotates, the first ring gear 504 rotates due to the first planetary carrier 503 being fixed. Further, when the first ring gear 504 rotates, the magnet shaft 604 connected to the first ring gear 504 rotates. As a result, the power input to the first sun gear 501 is decelerated from the magnet shaft 604 and output.

  As shown in FIG. 6, the sensor mechanism 6 is a mechanism for detecting the driving state of the door opening / closing device 1. The sensor mechanism 6 includes a brake bush 601, a wave washer 602, a brake cover 603, a magnet shaft 604, a magnet ring 605, a collar 606, a tolerance ring 607, a GMR (Giant Magneto Resistance Effect) sensor 608, and a bush 609. It is accommodated in cases 610 and 620 and unitized. The sensor cases 610 and 620 are fixed to the motor case 201 by screwing fixing ear portions 610a and 620a provided on the outer peripheral surface and the motor case 201 with bolts V1.

  The brake bush 601 is attached to the brake cover 603 via a wave washer 602. The magnet shaft 604 is fitted and fixed with a magnet ring 605. The magnet ring 605 is a flat plate ring-shaped member, and is magnetized so that S poles and N poles are alternately arranged along the circumference. The GMR sensor 608 is fixed to the sensor case 620. The magnet shaft 604 has a collar 606 inserted through a recess provided on the output shaft 3 side, and a tolerance ring 607 having corrugated irregularities inside the collar 606. Then, by inserting the second sun gear 702 (see FIG. 4) constituting the second planetary gear mechanism 7 inside the tolerance ring 607, the magnet shaft 604 and the second sun gear 702 are moved by the tolerance ring 607. It is pressed and fastened. The bush 609 fills the gap between the sensor case 620 and the second sun gear 702.

  The magnet shaft 604 is rotated by the power input from the first ring gear 504 of the first planetary gear mechanism 5. When the magnet shaft 604 rotates, the magnet shaft 604 and the magnet ring 605 rotate together. When the magnet ring 605 rotates, the GMR sensor 608 detects the magnetic flux density from the magnet ring 605 and generates a pulse signal. By detecting the pulse signal generated in this way by a pulse sensor, it is possible to detect the driving state of the door opening / closing device 1, particularly the rotational speed and direction. Further, when the magnet shaft 604 rotates, the second sun gear 702 fastened to the magnet shaft 604 rotates.

  The second planetary gear mechanism 7 and the third planetary gear mechanism 8 constituted by two-stage planetary gear mechanisms are input from the first planetary gear mechanism 5 via the sensor mechanism 6 as shown in FIG. A second speed reduction mechanism that decelerates and outputs the generated power.

  The two-stage planetary gear mechanism includes a ring gear cover 701, a second sun gear 702, a second planetary gear 703, a pin 704, a second planetary carrier 705, a third sun gear 801, and a third planetary. A gear 802, a pin 803, a third planetary carrier 804, a spacer 805, and a bush 806 are provided, and these are housed in a cylindrical housing member made up of gear cases 710 and 810 to form a unit. The gear case 710 includes a second ring gear 710b on the inner side, and the second ring gear 710b functions as a ring gear for both the second planetary gear mechanism 7 and the third planetary gear mechanism 8.

  The ring gear cover 701 is fitted into the gear case 710. The second sun gear 702 extending in the axial direction is fastened to the magnet shaft 604. The second planetary gear 703 is rotatably supported on the second planetary carrier 705 by a pin 704. The third sun gear 801 extending in the axial direction is serrated to the second planetary carrier 705. The third planetary gear 802 is rotatably supported on the third planetary carrier 804 by a pin 803. The output shaft 3 of the door opening / closing device 1 is connected to the third planetary carrier 804. The spacer 805 fills the gap between the gear case 710 and the gear case 810, and the bush 806 fills the gap between the gear case 810 and the output shaft 3. The gear case 710 is fixed to the sensor case 620 by screwing a fixing ear 710a provided on the outer peripheral surface and the sensor case 620 with a bolt V2. Further, the gear case 810 is fixed to the gear case 710 by screwing a fixing ear portion 810a provided on the outer peripheral surface and the gear case 710 with a bolt V3. A bracket B2 as a fixing means for fixing the door opening / closing device 1 to the vehicle body or the door is fixed to the gear case 810 by a bolt V4.

  When the second sun gear 702 is rotated by the power of the magnet shaft 604, the second planetary gear 703 rotates. When the second planetary gear 703 rotates, the second ring gear 710b formed in the gear case 710 does not rotate, so the second planetary carrier 705 rotates. When the second planetary carrier 705 rotates, the third sun gear 801 connected to the second planetary carrier 705 rotates.

  When the third sun gear 801 rotates, the third planetary gear 802 rotates. When the third planetary gear 802 rotates, the second ring gear 710b formed in the gear case 710 does not rotate, so the third planetary carrier 804 rotates. When the third planetary carrier 804 rotates, the output shaft 3 connected to the third planetary carrier 804 rotates. As a result, the power input to the second sun gear 702 is decelerated from the output shaft 3 and output.

  The second planetary gear mechanism 7 and the third planetary gear mechanism 8 are configured such that the second sun gear 702 and the third planetary carrier 804 (the output shaft 3 in the door opening / closing device 1) are shafts of the output shaft 3. It is configured to rotate on the mind.

  The output shaft 3 is disposed on an extension of the shaft center of the motor 2, and the power of the motor 2 is transmitted through the speed reduction mechanism 4. The output shaft 3 is connected to the arm member 901 of the arm 9. Then, the output shaft 3 outputs the power of the motor 2 input via the speed reduction mechanism 4 to the arm 9.

  The arm 9 includes an arm member 901, an arm spacer 902, a cushion 903, a shaft rod A, and a rod R. The arm 9 is connected to the rod R and the hinge 102 in FIG. 3 to link the output shaft 3 and the door, and transmits the power of the output shaft 3 to the rod R and the hinge 102. The base end portion of the arm member 901 is fixed to the output shaft 3 with the bolt V5 via the arm spacer 902. Further, the shaft rod A is connected to the distal end portion of the arm member 901 via a cushion 903. Further, the rod R is connected to the shaft rod A by a clip (not shown).

  Next, the operation of the door opening / closing device 1 of the present embodiment will be described. As shown in FIGS. 1 and 2, the door opening / closing device 1 opens and closes the back door 101. First, when the motor 2 of the door opening / closing device 1 receives a pulse current having a predetermined frequency (PWM frequency) and a predetermined duty ratio from the in-vehicle power source, the motor 2 is driven to rotate at a rotational speed corresponding to the duty ratio. . At this time, if the duty ratio of the pulse current is increased, the rotational speed of the motor 2 is increased, and if the duty ratio is decreased, the rotational speed of the motor 2 is decreased. Thereby, the motor 2 is PWM-controlled. The power of the driven motor 2 is transmitted to the output shaft 3 via the speed reduction mechanism 4, and the output shaft 3 rotates. When the output shaft 3 rotates, as shown in FIGS. 1 and 2, the arm 9 turns around the output shaft 3, and the rod R and the hinge 102 rotate together to open and close the back door 101. To do. The rotation direction of the motor 2 is switched depending on whether the back door 101 is opened or closed. Switching of the rotation direction of the motor 2 is realized by switching the direction in which the pulse current flows.

  Here, in the door opening and closing apparatus 1, as described above, the speed reduction mechanism 4 that transmits the power of the motor 2 along the axis of the output shaft 3 and the output shaft 3 are arranged on the axis of the output shaft 3. Thus, it is preferable that the axis of each member transmitting power is positioned on the axis of the output shaft 3 with high accuracy. In order for the axis of each member to be positioned on the axis of the output shaft 3, the axis of the end surface is highly accurate with respect to the axis of the reference plane perpendicular to the axis of each member at least for each member. It is required to be consistent with

  Therefore, in the door opening and closing apparatus 1 according to the present embodiment, the output shaft 3 is set to have a positional degree on both end faces of the output shaft 3 of, for example, φ0.03. The degree of position of the output shaft 3 is preferably set to φ0.01 or more and φ0.1 or less. As a result, since the output shaft 3 can transmit power along the axis of the output shaft 3 with high accuracy, the door opening / closing device 1 according to the embodiment is a door opening / closing device with high output efficiency.

  Similarly, the position degree of the first sun gear 501 is also set to a predetermined value. As shown in FIG. 5, the first sun gear 501 has a connecting portion 501a having a square cross section at the end on the motor 2 side, and has a flat plate portion 501b adjacent thereto. In the door opening and closing apparatus 1 according to the present embodiment, the first sun gear 501 is a connecting portion to the shaft center on the surface of the flat plate portion 501b that is a reference surface orthogonal to the shaft center of the first sun gear 501 on the motor 2 side. The degree of position of the axial center of the end surface on the motor 2 side of 501a was set to φ0.1, for example. The positional degree of the first sun gear 501 is preferably set to φ0.01 or more and φ0.1 or less. As a result, since the first sun gear 501 can transmit power along the axis of the output shaft 3 with high accuracy, the door opening / closing device 1 according to the embodiment is a door opening / closing device with high output efficiency. .

  Similarly, the coaxiality of the second sun gear 702 is also set to a predetermined value. In the door opening and closing apparatus 1 according to the present embodiment, the second sun gear 702 is configured such that the second sun gear 702 is in the center of the end surface on the motor 2 side that is a reference surface orthogonal to the axis of the second sun gear 702. The coaxiality of the axial center of the end surface opposite to the motor 2 is set to φ0.03, for example. The positional degree of the second sun gear 702 is preferably set to φ0.01 or more and φ0.1 or less. As a result, since the second sun gear 702 can transmit power along the axis of the output shaft 3 with high accuracy, the door opening / closing device 1 according to the embodiment is a door opening / closing device with high output efficiency. .

  As described above, the door opening and closing apparatus 1 according to the present embodiment has the position degree of the shaft center of the output shaft 3 and at least one end surface of the sun gear with respect to the shaft center in the reference surface orthogonal to the shaft center of the output shaft 3 and the sun gear. By setting the coaxiality to be not less than φ0.01 and not more than φ0.1, a door opening / closing device with high output efficiency is realized.

  Furthermore, the door opening / closing apparatus 1 according to the present embodiment suppresses unnecessary force from being applied to each member when the door opening / closing apparatus 1 is driven because the degree of position or coaxiality of each member is a predetermined value. The long-term reliability is also high.

  Next, the position of the center of gravity when the units of the door opening / closing device 1 are combined will be described. FIG. 8 is a schematic diagram showing the position of the center of gravity when the motor of the door opening and closing device of FIG. 3 and the first planetary gear mechanism are combined. As shown in FIG. 8, the eccentric distance between the center of gravity when the motor 2 and the first planetary gear mechanism 5 are combined and the axis of the output shaft 3 is 0.03 mm in the left-right direction in FIG. It was 1.11 mm in the vertical direction of the paper surface of FIG. In the door opening and closing apparatus 1 of the present embodiment, the position of the center of gravity and the eccentric distance are numerical values calculated using the measurement function of CATIA Version5 Build Number 22 manufactured by Dassault Systems.

  FIG. 9 is a schematic diagram showing the position of the center of gravity when the second planetary gear mechanism and the third planetary gear mechanism of the door opening / closing device of FIG. 3 are combined. As shown in FIG. 9, the eccentric distance between the center of gravity when the second planetary gear mechanism 7 and the third planetary gear mechanism 8 are combined with the axis of the output shaft 3 is shown in the horizontal direction of FIG. 0.18 mm and 0.00 mm in the vertical direction on the paper surface of FIG. 9, and both were set smaller than 1/10 of the diameter of the output shaft 3.

  FIG. 10 is a schematic diagram showing the position of the center of gravity when the motor, the speed reduction mechanism, and the output shaft of the door opening and closing device of FIG. 3 are combined. As shown in FIG. 10, the eccentric distance between the center of gravity when the motor 2, the speed reduction mechanism 4, and the output shaft 3 are combined with the axis of the output shaft 3 is 1.16 mm in the left-right direction in FIG. It was 1.81 mm in the vertical direction on the paper surface of FIG. 10, and both were set smaller than 2/10 of the diameter of the output shaft 3.

Figure 11 is a schematic diagram showing the gravity center position when the combination of the output shaft and the arm motor and speed reduction mechanism of the door opening and closing device of FIG. As shown in FIG. 11, the eccentric distance between the center of gravity when the motor 2, the speed reduction mechanism 4, the output shaft 3, and the arm 9 are combined with the shaft center of the output shaft 3 is 2 in the left-right direction in FIG. .92 mm and 1.7 mm in the vertical direction on the paper surface of FIG. 11, both of which were set smaller than 2/10 of the diameter of the output shaft 3.

  Thus, in the door opening and closing apparatus 1 according to the present embodiment, the eccentric distance between the center of gravity when the units are combined and the axis of the output shaft 3 is set to be sufficiently small. As a result, the power loss of the motor 2 is suppressed and output is efficiently performed. Therefore, the door opening / closing device 1 according to the present embodiment is a door opening / closing device with high output efficiency.

  Furthermore, the door opening and closing apparatus 1 of the present embodiment drives the door opening and closing apparatus 1 by setting the eccentric distance between the center of gravity when the units are combined and the axis of the output shaft 3 to be sufficiently small. At this time, unnecessary force is suppressed from being applied to each member, and there is an effect that long-term reliability is high.

  Furthermore, the door opening / closing device 1 of the present embodiment is not limited to the back door 101 but can also be used for opening / closing a sliding door provided on a side portion of the vehicle 100.

  FIG. 12 is a schematic diagram showing an installation example when the door opening and closing apparatus of the present embodiment is used for opening and closing a sliding door. FIG. 13 is a schematic diagram when FIG. 12 is viewed from above the vehicle. The sliding door 103 moves in the vehicle front-rear direction along a guide rail 104 provided in the vehicle 100. When the door opening and closing device 1 of the present embodiment is used for opening and closing the slide door 103, for example, the door opening and closing device 1 is installed inside the slide door 103 as shown in FIG. The door opening / closing device 1 is installed so that the direction of the rotation axis of the output shaft 3 is in the vehicle vertical direction, and the first rotating drum 904a is attached to the output shaft 3. The first rotating drum 904a is attached so as to rotate around the rotation axis of the output shaft 3. When the sliding door 103 is opened and closed using the door opening and closing device 1, the cable 105 provided along the guide rail 104 is wound and sent out by the first rotating drum 904a and the second rotating drum 904b. As a result, the slide door 103 moves along the guide rail 104.

  As described above, even when the door opening and closing apparatus 1 according to the present embodiment is installed on the slide door 103, the degree of position on both end faces of the output shaft 3 is set to be φ0.01 or more and φ0.1 or less. Thus, a door opening / closing device with high output efficiency can be realized.

  As described above, the door opening / closing device 1 according to the present embodiment is a door opening / closing device with high output efficiency.

  The first planetary gear mechanism 5, the second planetary gear mechanism 7, and the third planetary gear mechanism 8 are not limited to the configuration described above, and may have other configurations. For example, it is possible to appropriately design which part is fixed and which part is rotatable among the parts constituting the planetary gear mechanism. Further, the speed reduction mechanism connected to the motor 2 is not limited to the planetary gear mechanism, but may be a cycloid speed reduction mechanism, or a speed reduction mechanism using a spur gear. Further, the speed reduction mechanism is not limited to three stages, and may be 0 to 2 stages, or a plurality of stages including four or more stages.

  Moreover, the door opening / closing device 1 may include a clutch mechanism. The clutch mechanism is, for example, an electromagnetic clutch, but may have other configurations. Moreover, the door opening / closing device 1 may include a brake mechanism. The brake mechanism is, for example, a spring type, but may have other configurations.

  The output shaft 3 is a universal joint that can convert rotation of the output shaft 3 into rotation in a direction different from the rotation axis of the output shaft 3, and rotates on a rotation axis orthogonal to the rotation axis of the output shaft 3. A configuration in which an axial direction conversion mechanism, a motion conversion mechanism that converts a rotational motion output from the output shaft 3 into a linear motion along the axial direction, or the like may be attached.

  Further, the present invention is not limited by the above embodiment. What was comprised combining each component mentioned above suitably is also contained in this invention. Further effects and modifications can be easily derived by those skilled in the art. Therefore, the broader aspect of the present invention is not limited to the above-described embodiment, and various modifications can be made.

DESCRIPTION OF SYMBOLS 1 Door opening and closing device 100 Vehicle 101 Back door 102 Hinge 103 Sliding door 104 Guide rail 105 Cable 2 Motor 201 Motor case 3 Output shaft 4 Reduction mechanism 5 First planetary gear mechanism 501 First sun gear 501a Connection portion 501b Flat plate portion 502 First 1 planetary gear 503 1st planetary carrier 504 1st ring gear 510, 710, 810 Gear case 510a, 610a, 620a, 710a, 810a Fixing ear 6 Sensor mechanism 601 Brake bush 602 Wave washer 603 Brake cover 604 Magnet shaft 605 Magnet ring 606 Color 607 Tolerance ring 608 GMR sensor 609, 806 Bush 610, 620 Sensor case 7 Second planetary tooth Mechanism 701 Ring gear cover 702 Second sun gear 703 Second planetary gear 704, 803 Pin 705 Second planetary carrier 710b Second ring gear 8 Third planetary gear mechanism 801 Third sun gear 802 Third Planetary gear 804 Third planetary carrier 805 Spacer 9 Arm 901 Arm member 902 Arm spacer 903 Cushion 904a First rotating drum 904b Second rotating drum A Shaft rod B1, B2, B3 Bracket R Rod V1, V2, V3 , V4, V5 volts

Claims (2)

It has an arm that links the door,
A motor, and an output shaft disposed on an extension of the shaft center of the motor and to which the power of the motor is transmitted via a speed reduction mechanism,
A door opening and closing device that opens and closes the door via the output shaft by driving the motor ,
And the position of the center of gravity when the combination of the those fixed screwed with bolts to the front SL motor and the speed reduction mechanism and the output shaft via the arm spacer base end portion of the arm, the axis of said output shaft The door opening / closing apparatus is characterized in that the eccentric distance is set smaller than 2/10 of the diameter of the output shaft. The deceleration mechanism is
A first planetary gear mechanism, a second planetary gear mechanism, and a third planetary gear mechanism that sequentially reduce the power of the motor and rotate the output shaft;
An eccentric distance between the center of gravity when the motor and the first planetary gear mechanism are combined and the axis of the output shaft is set to be smaller than 1/10 of the diameter of the output shaft,
And,
An eccentric distance between the center of gravity when the second planetary gear mechanism and the third planetary gear mechanism are combined and the axis of the output shaft is set to be smaller than 1/10 of the diameter of the output shaft. The door opening and closing device according to claim 1 .

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